Audio Recordings Outshine Patterson-Gimlin Film as Bigfoot Evidence

Posted Saturday, June 20, 2026

By Squatchable.com staff

If you've spent any time in the Sasquatch research community, you know that the Patterson-Gimlin film is usually treated as the holy grail of evidence. But what if that whole time, we've been overlooking something even more compelling? That's exactly the argument being made in a recent video that crossed my feed, and honestly, it got me thinking. The host, who runs the Southeast Bigfoot Research Organization, makes a pretty bold claim right out of the gate. He suggests that audio evidence might actually be the strongest thing we have going for us, not the famous 1967 Bluff Creek footage. And when you really break it down, he might have a point. The discussion centers heavily on the Sierra Sounds, those recordings captured back in the early 1970s by Al Berry and Ron Morehead deep in the Sierra Nevada mountains of Eastern California. These guys were out on a hunting trip, roughly 40 miles from any back road, and what they captured on tape that night has been analyzed, debated, and scrutinized for decades. The recordings have gone through scientific evaluation, and unlike the Patterson film, there hasn't been this endless back-and-forth about whether they're real. The analysis has been established, quantified, and measured. But here's where it gets really interesting. The video also brings up the St. Louis County, Minnesota audio, and let me tell you, this one is wild. Multiple callers at different distances, producing vocalizations that don't match any known animal in that region. We're not talking about some distant, ambiguous noise either. The spectrogram analysis shows plateauing audio signatures that match other well-known recordings, including the Ohio Howl, which is considered another gold standard in Sasquatch audio evidence. What really makes this argument land is the science behind it. Spectrogram analysis allows researchers to visualize audio signatures and track them across different recordings. The host explains how distance affects what you can pick up on these recordings, and why having multiple callers at different points actually strengthens the evidence rather than weakening it. When you've got four different individuals vocalizing at multiple distances and the patterns still hold up, that's hard to dismiss. The comparison to "Jurassic Park" sounds that he makes? That's not an exaggeration. These vocalizations are deep, resonant, and completely unlike anything in the known North American wildlife catalog. Bears don't sound like that. Mountain lions don't sound like that. And unless someone has access to some kind of massive vocal apparatus, humans don't sound like that either. The beauty of audio evidence, as the host points out, is that it's tangible. You can play it for skeptics and say "explain this." And when they can't, you can point to the scientific analysis backing it up. That's a powerful position to be in. This is definitely worth checking out if you're into the research side of things. The host does a great job breaking down why we might need to rethink what we consider the "best" evidence, and the St. Louis County audio alone is worth the watch. It's one of those pieces of evidence that doesn't get nearly enough attention in my opinion. The video is up on YouTube and runs a decent length, giving plenty of time to really dig into the spectrogram analysis and explain why audio might be our strongest path forward. If you're someone who appreciates the scientific approach to this phenomenon, this one's for you.